JP5573629B2 - Air Jet Loom Deformation - Google Patents

Description

  The present invention relates to a deformed rod of an air jet loom.

As a conventional technique related to a deformed wrinkle of an air jet loom, for example, there is a deformed wrinkle for an air jet loom disclosed in Patent Document 1.
The deformed kite for air jet loom disclosed in Patent Document 1 forms a weft passage, and is configured so that the weft can stably fly at high speed in the weft passage.

FIG. 4 is an enlarged side view showing, in an enlarged manner, a main part of a wing 51 constituting a deformed ridge for an air jet loom disclosed in Patent Document 1. As shown in FIG.
As shown in FIG. 4, in the wing 51, the extension dimension Wa of the upper wall surface 52A of the guide hole 52 from the back wall surface 52B is 9.0 mm, and the vertical dimension Wb of the back wall surface 52B is 5.5 mm. Yes.
Further, in the wing 51, the extension dimension Wc of the lower wall surface 52C from the back wall surface 52B is set to 4.0 mm.
The distance L1 from the upper wall surface 52A to the injection hole 53A of the auxiliary nozzle 53 for weft insertion and the distance L2 in the front-rear direction from the tip on the opening side of the lower wall surface 52C to the injection hole 53A are determined by the weft insertion auxiliary nozzle. Is set so as not to adversely affect.

In the wing 51, the curvature radius r of the arc surface of the upper corner portion 52D in the guide hole 52 is set to 0.5 mm, and the curvature radius R of the arc surface of the lower corner portion 52E is set to 2.0 mm.
The front end side of the opening side of the lower wall surface 52C is formed by an arc surface having the same degree as the radius of curvature R of the lower corner portion 52E, and the lower wall surface 52C is almost composed only of a curved surface.
In this modified kite, the weft insertion auxiliary nozzle 53 can be brought closer to the wing 51, and the distance from the back wall surface 52B to the injection hole 53A is shortened, thereby reducing the air consumption of the weft insertion auxiliary nozzle. can do.

JP-A-8-74143

However, in the deformed kite for the air jet loom disclosed in Patent Document 1, the frequency of occurrence of weft insertion popping out from the weft passage may increase depending on the thickness of the weft.
In particular, as the yarn used for the weft becomes thicker, the frequency of weft insertion errors tends to increase.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to reduce the frequency of weft insertion errors in the weft yarn while making the air consumption of the auxiliary nozzle for weft insertion comparable to the conventional one. It is in the provision of a deformed air jet loom.

The present inventors have conducted intensive research to solve the above-mentioned problems, and as a result of repeated trial and error, on the premise that the weft insertion nozzle is as close as possible to the wing, the guide portion of the wing and the lower jaw We have found that weaving errors can be reduced by devising the dimension settings.
The present inventors have developed this knowledge and have completed the present invention shown below.

The present invention includes a weft passage formed by arranging a plurality of wings in the weft insertion direction, and the wings are positioned under a guide portion having an upper wall surface, a lower wall surface, and a back wall surface, and the guide portion. An air jet loom comprising: a lower jaw portion, a lower corner portion of an arc surface connecting the back wall surface and the lower wall surface, and a lower jaw corner portion of an arc surface which is a corner portion on a protruding side of the lower jaw portion The protrusion length of the lower jaw part is set to 5.0 mm or less, and the total curvature radius of the curvature radius of the lower corner part and the curvature radius of the lower jaw corner part is set smaller than the protrusion length , A straight portion is formed between the corner portion and the lower jaw corner portion .

According to the present invention, it is possible to shorten the distance between the weft insertion auxiliary nozzle and the upper corner portion of the guide portion as much as possible without excessively approaching the weft insertion auxiliary nozzle to the lower jaw portion, A straight portion having an air flow diffusion suppressing function is secured on the lower wall surface of the guide portion.
As a result, it is possible to reduce the frequency of occurrence of weft insertion mistakes while reducing air consumption.

In the present invention, in the deformed rod of the air jet loom, the length of the straight portion may be 1.5 mm or more.

  In this case, the lower wall surface of the guide portion includes a straight portion having a length that exerts a larger air flow diffusion suppressing function, so that weft insertion errors can be more reliably prevented.

  According to the present invention, it is possible to provide a deformed kite of an air jet loom that can reduce the frequency of weft insertion mistakes in the weft while reducing the air consumption of the auxiliary nozzle for weft insertion.

It is a perspective view which shows the outline | summary of the deformation rod of the air jet loom which concerns on embodiment of this invention. It is the expansion perspective view which expanded the principal part of the deformed bag which concerns on embodiment of this invention. It is a principal part enlarged side view of a deformed rod. It is the expansion perspective view which expanded the principal part of the deformed rod of the conventional air jet loom.

Hereinafter, a modification of an air jet loom according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the air jet loom includes a weft insertion device 10 using a deformation rod 11.
Deformed rods 11 are erected on the sley 12 of the weft inserting device 10, and the deformed rods 11 are formed by arranging a plurality of wings 13 in the weft inserting direction as shown in FIGS. Yes.

A guide portion 14 is formed in a concave shape in each wing 13, and the row of guide portions 14 formed by the lining of the wing 13 forms a weft passage 15 in the deformed ridge 11.
A weft insertion main nozzle 16 is installed at a position facing the weft passage 15, and the weft Y injected from the weft insertion main nozzle 16 flies through the weft passage 15.

A plurality of weft insertion auxiliary nozzles 17 are mounted along the weft passage 15 at predetermined intervals on the front surface of the sley 12.
An injection hole 18 is provided at the tip of the weft insertion auxiliary nozzle 17, and the position of the weft insertion auxiliary nozzle 17 is set so that the main injection from the injection hole 18 is directed obliquely along the weft passage 15. Has been.
A weft passage 15 is formed in the deformation rod 11, and the injection hole 18 of the auxiliary nozzle 17 for weft insertion is directed to the weft passage 15.
At the time of weft insertion, the weft insertion auxiliary nozzle 17 scrapes the warp T and enters the warp opening, and at the time of beating, the weft insertion auxiliary nozzle 17 is detached from the warp opening below the warp T.
The weft insertion auxiliary nozzle 17 has a small nozzle body diameter so that even if the warp T is scraped and the warp opening is moved into and out of the warp opening at a high speed, there is no adverse effect such as damage to the warp T.

Next, the guide part 14 of the wing 13 will be described.
As shown in FIGS. 2 and 3, the guide portion 14 of the shark feather is formed by an upper wall surface 21, a back wall surface 22, and a lower wall surface 23.
The guide portion 14 is formed with an upper corner portion 24 of an arc surface connecting the upper wall surface 21 and the inner wall surface 22 and a lower corner portion 25 of an arc surface connecting the inner wall surface 22 and the lower wall surface 23.
As shown in FIG. 3, the upper corner portion 24 is formed by an arc surface having a predetermined curvature radius BR, and the lower corner portion 25 is formed by an arc surface having a predetermined curvature radius CR.
An upper jaw portion 19 is formed on the upper portion of the guide portion 14 in the wing 13.
The upper jaw portion 19 is defined by an upper wall surface 21, an upper corner portion 24, an upper front wall surface 26, and an upper jaw corner portion 27 that connects the upper wall surface 21 and the upper front wall surface 26.
The upper jaw corner 27 is formed by a circular arc surface having a predetermined radius of curvature AR.
Therefore, the upper wall surface 21 includes an upper corner portion 24, a part of an arc surface forming the upper jaw corner portion 27, and a horizontal portion between these arc surfaces.
The forward protruding length A of the upper jaw portion 19 is a length from the back wall surface 22 to the foremost end of the upper jaw portion 19.

A lower jaw portion 20 is formed below the guide portion 14 in the wing 13.
The lower jaw portion 20 is defined by a lower wall surface 23, a lower corner portion 25, a lower front wall surface 28, and a lower jaw corner portion 29 that connects the lower wall surface 23 and the lower front wall surface 28.
The lower jaw corner 29 is formed by an arc surface having a predetermined radius of curvature DR.
Therefore, the lower wall surface 23 includes a part of the lower corner portion 25 and the lower jaw corner portion 29 and a straight portion α between them.
In this embodiment, the straight line portion α is a downward gradient set at an inclination angle of 10 degrees with respect to the horizontal.
In FIG. 2, for convenience of explanation, the boundary between the lower corner portion 25 and the straight portion α on the lower wall surface 23 and the boundary between the straight portion α and the lower jaw corner portion 29 are illustrated by broken lines. .
As shown in FIG. 3, the protrusion length B forward of the lower jaw part 20 is the length from the back wall surface 22 to the foremost end of the lower jaw part 20.

In this embodiment, in addition to the condition that the protruding length B of the lower jaw 20 is set to 5.0 mm or less (hereinafter referred to as “condition 1”), the curvature radius CR of the lower corner 25 and the lower jaw corner 29 The total radius of curvature (CR + DR) with the radius of curvature DR satisfies the condition (hereinafter referred to as “condition 2”) set to be smaller than the protrusion length B.
In order to reduce the air consumption of the weft insertion auxiliary nozzle 17, it is effective to shorten the distance between the upper corner portion 24 and the injection hole 18 of the weft insertion auxiliary nozzle 17 as much as possible. However, if the lower jaw portion 20 and the weft insertion auxiliary nozzle 17 are too close to each other, a mark (nozzle mark) is generated due to the pressing of the warp T against the deformed scissors 11 when the warp T is scraped at the time of weft insertion. Since there is a possibility that T may be adversely affected, there is a limit to shortening the distance between the lower jaw 20 and the weft insertion auxiliary nozzle 17. Therefore, in order to reduce the air consumption, it is necessary to shorten the protruding length B of the lower jaw 20 as much as possible.

  By satisfying the condition 1, in the modified scissors 11, the weft insertion auxiliary nozzle 17 can be brought closer to the reed wing 13 and the distance from the upper corner portion 24 to the injection hole 18 is shortened. Air consumption can be reduced.

By satisfying condition 2, the lower wall surface 23 of the wing 13 surely includes the straight portion α.
That is, the wings having the lower wall surface 23 in which only the arcuate surfaces of the lower corner portion 25 and the lower jaw corner portion 29 exist and do not include the straight portion α are excluded.
The lower wall surface 23 is formed with a straight portion α that enters the weft passage 15 side as it goes in the weft insertion direction. However, if the straight portion α having a sufficient length is not formed, the air flow diffusion suppressing effect by the formation of the straight portion α is reduced. The weft Y tends to jump out of the weft passage 15. The lower wall surface 23 including the straight line portion α is an element that makes it difficult for the weft Y to come off the weft passage 15 during weft insertion. According to the wing 13 that satisfies the condition 2, only the lower corner portion 25 and the lower jaw corner portion 29 are provided. As compared with a wing having an existing guide portion, occurrence of a weft insertion error of the weft Y is suppressed.

Further, as a more preferred wing, in addition to satisfying the conditions 1 and 2, the sum of the curvature radii (CR + DR) from the protrusion length B of the lower jaw 20 to the curvature radius CR of the lower corner 25 and the curvature radius DR of the lower jaw 29 ) Is a wing that satisfies a condition (hereinafter referred to as “condition 3”) of 1.5 mm or more.
When the condition 3 is satisfied, the lower wall surface 23 includes the straight portion α having a sufficient length to reliably prevent a weft insertion error, and the weft Y may be detached from the weft passage 15 during the weft insertion. It is surely prevented.
Conversely, when the difference “B− (CR + DR)” is less than 1.5 mm, the lower wall surface including the straight portion α having an insufficient length or not having the straight portion α is set. There is a high possibility that a weft insertion error occurs when the weft Y is disengaged from the weft passage 15 at the time of weft insertion.

Next, the modified bag according to the present invention will be specifically described with reference to examples.
A plurality of examples of wings (Examples 1 to 3 and Comparative Example) in which the dimensions of each part were changed were manufactured, and deformed ridges were formed by each wing.
Each deformation rod was mounted on a weft insertion device in an air jet loom and an operation test was performed, and the operation test result was evaluated.
In addition, the air jet loom used for the operation test of Examples 1-3 and the comparative example was JAT710 made by our company, the loom rotation speed was 900 rpm, and the weft was 6th.
Examples 1 to 3 and a comparative example are shown in Table 1.

<Example 1>
As shown in Table 1, the wings of Example 1 have a projection length A of 9.0 mm, a projection length B of 5.0 mm, a curvature radius CR of 1.0 mm, and a curvature radius DR of 2.0 mm. doing.
Therefore, the total radius of curvature (CR + DR) is 3.0 mm, and the difference “B− (CR + DR)” obtained by subtracting the total radius of curvature (CR + DR) from the protruding length B is 2.0 mm, which is a straight portion included in the lower wall surface. Is 2.68 mm in length.
The deformed kite using the kite feather of Example 1 satisfies the conditions 1 to 3.
The operation test result in Example 1 is that the investigation time is 8 hours and 15 minutes, the occurrence of weft insertion error is 0 times during the investigation time, and the number of wetting errors per hour (converted value) is also 0 (times / time). h).
Therefore, the evaluation of the operation test result is good.

<Example 2>
As shown in Table 1, the wings of Example 2 have a projection length A of 9.0 mm, a projection length B of 4.7 mm, a curvature radius CR of 1.0 mm, and a curvature radius DR of 2.0 mm. doing.
Therefore, the total radius of curvature (CR + DR) is 3.0 mm, and the difference “B− (CR + DR)” obtained by subtracting the total radius of curvature (CR + DR) from the protrusion length B is 1.7 mm, which is a straight portion included in the lower wall surface. The length of α is 2.38 mm.
The deformed kite using the kite feather of Example 2 satisfies the conditions 1 to 3.
The operation test result in Example 2 is that the investigation time is 7 hours and 16 minutes, the occurrence of weft insertion error is 0 times during the investigation time, and the number of weft insertion mistakes per hour (converted value) is also 0 (times / time). h).
Therefore, the evaluation of the operation test result is good.

<Example 3>
As shown in Table 1, the wing of Example 3 has a projection length A of 9.0 mm, a projection length B of 4.0 mm, a curvature radius CR of 1.0 mm, and a curvature radius DR of 2.0 mm. Has been.
Therefore, the total radius of curvature (CR + DR) is 3.0 mm, and the difference “B− (CR + DR)” obtained by subtracting the total radius of curvature (CR + DR) from the protrusion length B is 1.0 mm, which is a straight portion included in the lower wall surface. The length of α is 1.66 mm.
The modified kite using the kite feather of Example 3 satisfies the conditions 1 and 2.
The operation test result in Example 3 is that the investigation time is 8 hours and 24 minutes, and the occurrence of a weft insertion error occurs once during the investigation time, and the number of weft insertion errors per hour (converted value) is 0.12 ( Times / h).
In Example 3, although the occurrence of a weft insertion error was present, it was an occurrence frequency with no practical problem. Therefore, the evaluation of the operation test result is good.

<Comparative example>
As shown in Table 1, the wings of the comparative example are set to a projection length A of 9.0 mm, a projection length B of 4.0 mm, a curvature radius CR of 2.0 mm, and a curvature radius DR of 2.5 mm. ing.
Therefore, the total radius of curvature (CR + DR) is 4.5 mm, and the difference “B− (CR + DR)” obtained by subtracting the total radius of curvature (CR + DR) from the protrusion length B is −0.5 mm, which is a straight line included in the lower wall surface. The length of the part α is 0.45 mm.
The deformed kite using the kite feather of the comparative example satisfies only the condition 1 and does not satisfy the conditions 2 to 3.
The operation test result in the comparative example is that the investigation time is 1 minute and 7 seconds, the occurrence of weft insertion error is 5 times during the investigation time, and the number of weft insertion mistakes per hour (converted value) is 270 (times / h) )Met.
This is the frequency of occurrence of a weft insertion error, which is a problem in practical use. Therefore, the evaluation of the operation test result is poor.

According to this embodiment, there exist the following effects.
(1) The protrusion length B of the lower jaw 20 is set to 5 mm or less, and the total curvature radius of the curvature radius CR of the lower corner 25 connecting the back wall 22 and the lower wall 23 and the curvature radius DR of the lower jaw 29 By setting (CR + DR) to be smaller than the protrusion length B, a sufficient length of the straight line portion α is secured on the lower wall surface 23. For this reason, it is difficult for the weft Y to come off the weft passage during weft insertion, and the occurrence of weft insertion errors can be reduced. In particular, even when the yarn used for the weft becomes thicker, the frequency of occurrence of weft insertion is reduced as compared with the prior art.

(2) Since the difference obtained by subtracting the sum of curvature radii (CR + DR) from the protrusion length B is 1.5 mm or more, the lower wall surface 23 has a straight portion α having a sufficient length to reliably prevent a weft insertion error. Therefore, the weft Y can be more reliably prevented from coming off the weft passage 15 during weft insertion. As a result, the occurrence of a weft insertion error of the weft Y can be more reliably prevented.

  It should be noted that the deformation of the air jet loom according to the above embodiment shows an embodiment of the present invention, and the present invention is not limited to the above embodiment, and is within the scope of the gist of the invention. Various changes can be made.

11 Deformed ridges 13, 51 wing 14 Guide portion 15 Weft thread passage 17, 53 Weft insertion auxiliary nozzle 18, 53A Injection hole 19 Upper jaw portion 20 Lower jaw portion 21, 52A Upper wall surface 22, 52B Back wall surface 23, 52C Lower wall surface 24, 52D Upper corner 25, 52E Lower corner 26 Upper front wall 27 Upper jaw corner 28 Lower front wall 29 Lower jaw corner 52 Guide hole A Projection length (upper jaw)
B Protrusion length (mandible)
AR radius of curvature (maxillary corner)
BR radius of curvature (upper corner)
CR curvature radius (lower corner)
DR Curvature radius (Mandibular corner)
Y Weft T Warp Wa Wa Extension dimension Wb Vertical dimension Wc Extension dimension r, R Curvature radius L1, L2 Distance α Linear part

Claims (2)

With a weft passage formed by multiple rows of wings in the weft insertion direction,
The wings are
A guide portion having an upper wall surface, a lower wall surface and a back wall surface;
A lower jaw part located under the guide part;
A lower corner portion of an arc surface connecting the back wall surface and the lower wall surface;
In a deformed rod of an air jet loom comprising a lower jaw corner portion of an arc surface that is a corner portion on the protruding side of the lower jaw portion,
The protruding length of the lower jaw is set to 5.0 mm or less,
The sum of the curvature radii of the curvature radius of the lower corner portion and the curvature radius of the lower jaw corner portion is set smaller than the protruding length , and a straight portion is formed between the lower corner portion and the lower jaw corner portion . A variant of an air jet loom characterized by The length of the straight part is 1.5 mm or more, and the deformed rod of the air jet loom according to claim 1.

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